const toString = Object.prototype.toString;

export function is(val, type) {
	return toString.call(val) === `[object ${type}]`;
}

export function isDef(val) {
	return typeof val !== 'undefined';
}

export function isUnDef(val) {
	return !isDef(val);
}

export function isObject(val) {
	return val !== null && is(val, 'Object');
}

export function isEmpty(val) {
	if (isArray(val) || isString(val)) {
		return val.length === 0;
	}

	if (val instanceof Map || val instanceof Set) {
		return val.size === 0;
	}

	if (isObject(val)) {
		return Object.keys(val).length === 0;
	}

	return false;
}

export function isDate(val) {
	return is(val, 'Date');
}

export function isNull(val) {
	return val === null;
}

export function isNullAndUnDef(val) {
	return isUnDef(val) && isNull(val);
}

export function isNullOrUnDef(val) {
	return isUnDef(val) || isNull(val);
}

export function isNumber(val) {
	return is(val, 'Number');
}

export function isPromise(val) {
	return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch);
}

export function isString(val) {
	return is(val, 'String');
}

export function isFunction(val) {
	return typeof val === 'function';
}

export function isBoolean(val) {
	return is(val, 'Boolean');
}

export function isRegExp(val) {
	return is(val, 'RegExp');
}

export function isArray(val) {
	return val && Array.isArray(val);
}

export function isWindow(val) {
	return typeof window !== 'undefined' && is(val, 'Window');
}

export function isElement(val) {
	return isObject(val) && !!val.tagName;
}

export function isMap(val) {
	return is(val, 'Map');
}

export const isServer = typeof window === 'undefined';

export const isClient = !isServer;

export function isUrl(path) {
	const reg =
		/^((https|http|ftp|rtsp|mms):\/\/)(([0-9a-zA-Z_!~*'().&=+$%-]+: )?[0-9a-zA-Z_!~*'().&=+$%-]+@)?(([0-9]{1,3}.){3}[0-9]{1,3}|([0-9a-zA-Z_!~*'()-]+.)*([0-9a-zA-Z][0-9a-zA-Z-]{0,61})?[0-9a-zA-Z].[a-zA-Z]{2,6})(:[0-9]{1,4})?((\/?)|(\/[0-9a-zA-Z_!~*'().;?:@&=+$,%#-]+)+\/?)$/;
	return reg.test(path);
}